/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassEntityTypes.h
typedef [TStructTypeBitSet](API\Plugins\StructUtils\TStructTypeBitSet)< [USubsystem](API\Runtime\Engine\Subsystems\USubsystem), [FMassExternalSubsystemBitSetStructTrackerWrapper](API\Plugins\MassEntity\FMassExternalSubsystemBitSetStru-), [UClass](API\Runtime\CoreUObject\UObject\UClass) > FMassExternalSubsystemBitSet